Allen and Greenough's New Latin Grammar for Schools and Colleges
J. B. Greenough, G. L. Kittredge, A. A. Howard, Benj. L. D'Ooge, Ed.

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[*] 265. New stems are formed by Composition in three ways:—

The second part is simply added to the first:—
1. su-ove-taurīlia (sūs, ovis, taurus), the sacrifice of a swine, a sheep, and a bull (cf. § 255. a).
2. septen-decim (septem, decem), seventeen.
The first part modifies the second as an adjective or adverb (Determinative Compounds):—
1. lāti-fundium (lātus, fundus), a large landed estate.
2. omni-potēns (omnis, potēns), omnipotent.
The first part has the force of a case, and the second a verbal force (Objective Compounds):—
1. agri-cola ( ager , field, † cola akin to colō , cultivate), a farmer.
2. armi-ger ( arma , arms, † ger akin to gerō , carry), armor-bearer.
3. corni-cen ( cornū , horn, † cen akin to canō , sing), horn-blower.
4. carni-fex ( carō , flesh, †fexakin to faciō, make), executioner.

[*] a. Compounds of the above kinds, in which the last word is a noun, may become adjectives, meaning possessed of the quality denoted:—

1. āli-pēs (āla, wing, pēs, foot), wing-footed.
2. māgn-animus (māgnus, great, animus, soul), great-souled.
3. an-ceps (amb-, at both ends, caput, head), double.

[*] Note.--Many compounds of the above classes appear only in the form of some further derivative, the proper compound not being found in Latin.

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Syntactic Compounds